Antifouling coating for metal structures.



UNITED STATES ARTHUR TREVOR DAWSON AND GEORGE PATENT OFFIcE.

THOMAS BUG-KHAN, or LONDON,

ENGLAND, ASSIGNORS TO THE VICKERS, SONS & MAXIM, LIMITED, OF

SHEFFIELD, ENGLAND.

BREECH MECHANISM FOR BREECH-L OADING ORDNANCE.

SPECIFICATION forming part of Letters Patent No. 629,288, dated July 18,1899. 8 Application filedDecember 13, l898.- Serial No. 699,164. Nomodel.)

To (IJZ 1071 0761, it may concern.-

Be it known that WB,ARTHUR TREvoR DAW- son and GEORGE THOMAS BUCKHAM,citizens of England, residin g at No. 28 Victoria street,

\Vestminster, London, England, have invented certain new and usefulImprovements in Breech Mechanism for Breech-Loading Ordnance, (for whichapplications for patents have been made in Belgium, dated October 1o 27,1808, No. 108,523; in France, dated October 27, 1898, No. 270,319; inGreat Britain, dated October 27, 1898 No. 22,606; in Italy, datedOctober 31, 1898, he. 14,828, and in Sweden, dated October 29, 1898, No.1,676,) of which the following is a specification;

This invention has forits object to improve the mechanism of thebreech-loading ordnance for which Letters Patent Nos. 602,785 and610,110 were issued April 19, 1898, and

August 30, 1898, respectively.

The breech mechanism to which our invention is applied is of the kind'inwhich the breech of the gun is closed by a screw-plug which hasinterrupted or segmental threads 2 5 or rings and is locked or unlockedby a partial rotation on its axis. This plug is carried on a swingingarm or carrier which is hinged to.one' side at the breech of the gun andis moved by a hand-lever'or by worm-gear k worked by hand. I

The form of obturator which we em ployis such that the breech-plug canbe swung out of the gun without any longitudinal vwithdrawal directlyafter it is unlocked.

.35 We shall describe our invention, referring to the accompanyingdrawings.

Figure 1 isa front View, and Fig. 2 is a plan, of the carrier and breechmechanism. Fig. 3 is a part section on the line 3 3 of Fig. 2, and Fig.4 is an elevation of part of the breech of the gun with the plug andcarricriu sec tion.

A is thecarrier, and B the breech-plug, which are shown in the openposition by the 5 dotted lines" A B in Fig. 2, the carrier swinging onits hinge-pin C. On this pin, about midway of its height, we fix atoothed segment 1), which gears with a segment of a pinion E, pivoted ina recess in the carrier. Part of 8 5o thc'pcriphcry of the pinion E hasskew-teeth gearing with similar teeth on a pinion F, which -.is alsopivoted in arecess of the carrier, so that it'can revolve ina planeparallel to the breech-faceof the gun. From the-pinion F projects ashort arm G, having a pin f connected by a link H toa pin 1), projectingrearward from the face of the breech-plug. The link H and the short armG are so arranged as to be ina nearly-st raightline when the breech islocked, the pln f being then somewhat past the dead-center and the linkH bearing against the upper side h of the recess of the carrier in whichthe parts are accommodated. Thus when the breech is closed thebreech-plug is locked against any tendency to become unlocked by theshock of the explosion. I

The hinge-pin O, on which the carrier A is fixed, may be rotated by handor by wormgear K, as-shown.

When the firing-gear L is of the kind described in the Patent No.610,110, the nut and slide are so arranged that the slide instead ofmoving vertically down to cock the firing-pin for safety is movedhorizontally toward the pivot of the carrier. In order to effect thismovement, we employ a connecting-bar M, sliding in a groove on the rearface of-the'carrier A and having its one end connected to the slide ofthe firingear by a spring-pin m, and at its other end there is a secondspring-pin n, which projects forward into the recess inthe carrier inwhich the pinion F is pivoted, so as to enter a cam-slot N, formed inthe rear part of the arm G. This cam-slot is so formed as to give theconnecting-bar M a very quick motion toward the pivot of i the carrierduring the first part of the movement of the arm G before thebreech-plug is unlockedthat is, before the pin f has moved back beyondthe dead-center. This insures that the charge cannot be fired exceptwhen the breech-plug is locked in the gun. By the continued movement thecam-slot N moves the connecting-bar M of the firing-gear still farthertoward the side .of the'gun, causing automatic ejection of the No.629,426. Patented July 25,1899. 6. D. COLEMAN. ANTIFOULING COATING FORMETAL STRUCTURES.

(Application filed Apr. 11, 1898.)

(No Model.)

